Question

oblicz. a 2/3 + 1/4 b 3/4 + 3/5 c 1/4 + 2/7 d 2/3 + 1/8 e 1/4 + 1/6 f 1/6 + 4/9 g 3/8 + 7/10 h 5/6 + 3/8.

Answer 1

a 2/3 + 1/4 =8/12 + 3/12 = 12/12 =1

b 3/4 + 3/5 =15/20+12/20=27/20=1 7/20

c 1/4+2/7=7/28+8/28=15/28

d 2/3+1/8=16/24+3/24=19/24

e 1/4+1/6=6/24+4/24=10/24

f 1/6+4/9=9/36+24/36=33/36

g 3/8+7/10=30/80+56/80=86/80=1 6/80

h 5/6+3/8=40/48+18/48=58/48=1 10/48